Izzy's dream finally came true in January 2016 when she gave birth to Lola, pictured with her daughter and her husband, McFly drummer Harry

Growing up alongside her three older brothers, Rupert, Magnus and Guy, Izzy was an anxious child. Her symptoms worsened when, two weeks before her 13th birthday, Rupert was involved in a horrific car accident on the M25.

“He was pronounced dead at the scene but was brought back to life,” she said. “He’s been left with considerable brain damage but has fought every setback.”

Izzy said the crash was a “catalyst” for her anxiety worsening. “I was young and it was that stark reality of life and death you’ve never been faced with before," she said. "It prevented me from emotionally developing because I was so affected.

Izzy looks on as her adorable daughter Lola kisses her pregnant belly. She discovered she was expecting her second child in January

“He lives in a residental home with 24-hour care. All through my fertility issues, when I was really in my darkest moments, I’d get a call from him and it made me realise how lucky I am. I really wanted to have a baby for him as well, for him to be an uncle.”

Izzy met Harry Judd, 31, in 2005 when she was playing violin in the backing orchestra on McFly’s Wonderland tour. In 2008, she played in the Britain’s Got Talent finals with her band Escala. Then in 2012, Harry popped the question.

In May 2013 – nearly a year to the day of their engagement – they started trying for a baby.

Izzy has polycystic ovary syndrome, which caused her to stop ovulating, but she doesn’t think that was the only hurdle to overcome in her dream of becoming a mum.

Izzy described herself as an ‘anxious child’, pictured right, with her parents and brothers, Rupert and Guy

“I was taking this medication but it wasn’t working and it was affecting my confidence. It got to the point where I wouldn’t go to things with Harry. It was like the world had stopped and someone had pressed pause, I couldn’t move.”

Izzy said becoming pregnant became a “total obsession” and it affected their sex life.

“I think even Harry got fed up and that’s saying something,” she joked. “The reason for doing it was not romantic. We were just like ‘go, go, go!’ There was a funny side to it. Harry is my best friend and we talked it through. He was a constant support.

“One day, after yet another negative pregnancy test, I came downstairs and was so sad. There were no tears. I just felt completely empty, exhausted and drained of all joy. Harry got down on his knees and said: ‘Izzy, worst case scenario, it’s you and me. That’s still a pretty good scenario, right?’”

After her pregnancy struggles, Izzy was astounded to discover she was pregnant with her second child in January, pictured in June

“People say, 'be careful your anxieties rub off on your children' but she’s rubbing off on me. I haven’t had an anxiety attack since she was here.

“Harry has been a wonderful dad, and is wonderful to me too. He’s brilliant with Lola and so happy to do everything for her. She’s his world. I can see that she’ll be Daddy’s little girl for ever.”

Encouraged by Harry, Izzy decided to write a book, Dare To Dream, about her fertility struggles.

“After we had Lola I got chatting to women and I’d be open about how we’d conceived, then they’d open up to me,” she said.

“It suddenly struck me how many women are affected by fertility issues. Also, that IVF isn’t spoken about much. It’s seen as a frightening experience but I look at from another perspective, it can be a positive thing.”

WHAT IS IVF?

IVF - which means in vitro fertilisation - is one of several techniques available to help people with fertility problems have a baby.

During IVF, an egg is removed from the woman's ovaries and fertilised with sperm in a laboratory.

The fertilised egg, called an embryo, is then returned to the woman's womb to grow and develop.

It can be carried out using your eggs and your partner's sperm, or eggs and/or sperm from donors.

On the NHS, IVF is offered to women under 43 years of age who have been trying to get pregnant through regular unprotected sex for two years.

If you're not eligible for NHS treatment, or you decide to pay for IVF, you can have treatment at a private clinic.

Costs vary, but one cycle of treatment may cost up to £5,000 or more.

The success rate of IVF depends on the age of the woman undergoing treatment, as well as the cause of the infertility (if it's known).

Younger women are more likely to have a successful pregnancy.

IVF isn't usually recommended for women above the age of 42, because the chances of a successful pregnancy are thought to be too low.

Maintaining a healthy weight and avoiding alcohol, smoking and caffeine during treatment may improve your chances of having a baby with IVF.